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Constantan45 Super Fine Round Wire, 0.18mm Diameter Low Thermal EMF Copper-Nickel Alloy Wire for Strain Gauge & Miniature Embedded Temperature Sensors
| Place of Origin | Shanghai |
|---|---|
| Brand Name | Huona |
| Certification | ISO 9001 |
| Model Number | Constantan45 |
| Minimum Order Quantity | 5KG |
| Price | Negotiable |
| Packaging Details | Carton/Wooden Case |
| Delivery Time | 5-21 days |
| Payment Terms | L/C,T/T,Western Union |
| Supply Ability | 500 tons per month |
Product Details
| Alloy Designation | Constantan45 Strain Measurement Grade (55Cu / 45Ni) | Standard Diameter | 0.18mm |
|---|---|---|---|
| Custom Diameter Range | 0.018mm ~ 0.9mm Exclusive Ultra-Fine Tiny Gauges | Surface Treatment | Stress-Free Full Soft Homogenization Annealed, Mirror Polished, Fully Deburred Concentric Round Surface |
| Operating Temperature | -90°C ~ 340°C (Clean Dry Semiconductor & Precision Laboratory Low-Interference Atmosphere) | Reference Resistivity | 0.49 µΩ·m At 20°C Reference Ambient Temperature |
| Temperature Coefficient Of Resistance & Thermal EMF | Ultra-minimal Drift And Stray Thermal Voltage Within Full Precision Working Temperature Band | Processing Performance | Super Micro Ductility, Supports Ultra-tight Tiny-radius Micro Winding, No Fracture After Repeated Fine Bending |
Product Description
Product Overview
This single-spool Constantan45 ultra-fine solid round wire is independently produced by HUONA with precise 55Cu-45Ni alloy proportion, specially optimized for strain measurement components and micro embedded temperature sensing modules, completely differentiated from medium-diameter light-industry Constantan45, thick high-current Constantan45 and conventional CuNi44 constantan materials. It adopts multi-pass micro ultra-fine drawing and stress-free full soft homogenization annealing process, featuring ultra-consistent concentric circular cross-section, scratch-free mirror silver metallic surface, extremely low thermoelectric electromotive force and outstanding micro bending ductility. Uniformly compacted on lightweight single ivory grid plastic spools as shown in the picture, the slim wire layer layout avoids tangling during ultra-high-speed micro winding operations. It serves as core raw material for precision strain gauges, micro built-in PCB temperature sensors and ultra-slim Type J/T thermocouple negative conductors used in semiconductor testing and compact precision automation equipment.
Core Specifications
Product Name: Constantan45 Ultra-Fine Strain-Grade Solid Round Wire
Alloy Grade: Constantan45 (55% Copper + 45% Nickel, independent strain-measurement grade distinct from general-purpose and power-load Constantan45 variants)
Processing Technology: Multi-stage micro ultra-fine precision drawing + stress-free full soft homogenization annealing + superfine surface deburring & mirror polishing
Standard Specification: 0.18mm Nominal Diameter
Customizable Size Range: Diameter 0.018mm–0.9mm ultra-fine tiny gauges only
Surface Condition: High-gloss silver mirror finish, perfect round concentricity, zero burrs, oxidation stains and longitudinal drawing marks
Electrical Performance: Stable fixed volume resistivity, ultra-low thermal EMF interference, negligible resistance drift under tiny ambient temperature fluctuations
Operating Temperature Range: -90°C ~ 340°C (continuous stable operation under clean dry low-interference precision laboratory and semiconductor production environments)
Standards Compliance: IEC 60584, GB/T 6149, RoHS 2.0, REACH eco-friendly non-toxic material certification
Key Differentiating Advantages
1. Purified Strain-Grade Constantan45 Alloy Minimizes Thermal Signal Interference
Different from all other general Constantan45 specifications, this ultra-fine wire adopts high-purity low-impurity smelting technology to refine internal metal grain structure, which drastically reduces parasitic thermal electromotive force that distorts strain measurement data. Its balanced copper-nickel composition maintains nearly consistent resistance value under micro temperature changes, ensuring high linearity and repeatability for strain gauge calibration, with consistent alloy performance between batches to eliminate repeated calibration work in precision measuring component mass production.
2. Ultra-Low Thermal EMF Matches Micro Embedded Thermosensor Production
As a specialized negative matching alloy for ultra-slim Type J and Type T thermocouples, this thin Constantan45 wire generates minimal stray thermal voltage when paired with iron or copper positive wires. Its tiny wire diameter supports fabrication of ultra-miniature embedded temperature probes that can be mounted inside PCB gaps and semiconductor test fixtures, delivering clean, distortion-free temperature signal output for precision electronic thermal monitoring systems.
3. Stress-Free Annealed Ultra-Soft Texture for Micro Precision Forming
Full homogenization annealing completely erases all internal tensile stress generated during micro ultra-fine drawing, granting the wire exceptional pliability to withstand ultra-small radius coiling, micro laser cutting and layered fine winding without springback, splitting or diameter deformation. Uniform circular cross-section ensures even tension distribution during automated micro winding, stabilizing strain sensitivity and resistance balance of finished strain gauge assemblies.
4. Single Ivory Grid Spool Optimized for Micro Winding Equipment
The ultra-fine Constantan45 wire is neatly layered on lightweight single ivory grid-flange plastic spools; the hollow grid rim effectively blocks slippage of fragile tiny wire during continuous high-speed micro unwinding. A blank marking area on the central hub enables independent specification and batch labeling for strict traceability in semiconductor and precision instrument factories, while the polished wire surface prevents micro metal abrasion against delicate ceramic winding machine guide holes.
5. Clean Low-Dust Anti-Oxidation Fits Semiconductor & Lab Cleanroom Scenarios
Constantan45 copper-nickel alloy features mild anti-oxidation capacity under clean dry low-dust environments such as semiconductor cleanrooms and analytical laboratories. It will not form loose conductive oxide precipitates that interfere with strain signal collection, retaining stable mechanical and electrical properties through frequent low-to-medium temperature cycles inside sealed precision testing equipment, extending the service life of micro strain gauges and embedded temperature sensors without measurement deviation.
Technical Specifications Table
| Attribute | Typical Specification |
|---|---|
| Alloy Designation | Constantan45 Strain Measurement Grade (55Cu / 45Ni) |
| Standard Diameter | 0.18mm |
| Custom Diameter Range | 0.018mm ~ 0.9mm Exclusive Ultra-Fine Tiny Gauges |
| Surface Treatment | Stress-Free Full Soft Homogenization Annealed, Mirror Polished, Fully Deburred Concentric Round Surface |
| Operating Temperature | -90°C ~ 340°C (Clean Dry Semiconductor & Precision Laboratory Low-Interference Atmosphere) |
| Reference Resistivity | 0.49 µΩ·m at 20°C reference ambient temperature |
| Temperature Coefficient of Resistance & Thermal EMF | Ultra-minimal drift and stray thermal voltage within full precision working temperature band |
| Processing Performance | Super micro ductility, supports ultra-tight tiny-radius micro winding, no fracture after repeated fine bending |
Supply & Packaging Standard
Supply Form: Continuous ultra-fine solid Constantan45 wire neatly layered on single lightweight ivory grid industrial plastic spools; standard full-length single reels and custom ultra-short precision small coil orders are both available
Packaging: Each single ivory spool individually sealed with dust-free anti-oxidation cleanroom-grade plastic bag plus soft shock-absorbing foam buffer, suitable for cleanroom production supply and lightweight cross-border small-batch export shipping
MOQ: 1 single ivory grid spool for micro strain gauge prototype testing; large-volume bulk supply for semiconductor sensor factories, precision strain measuring instrument manufacturers and micro embedded thermosensor component producers
Customization Service: Custom ultra-fine wire tiny diameter, single spool winding total length, annealing softness grade and surface ultra-smooth polishing finish based on micro strain gauge and PCB embedded miniature temperature probe production requirements
Typical Application Scope
Precision Strain Gauge Core Winding Wire: Exclusive raw material for high-sensitivity strain gauges used in material stress testing, load cell transducers and structural deformation monitoring instruments.
Ultra-Mini Embedded PCB Thermocouple Negative Leg: Slim matching negative alloy wire for micro Type J & Type T temperature probes embedded inside circuit boards and semiconductor test jigs.
Laboratory Micro Thermal Analysis Instrument Parts: Low-interference resistive wire for desktop micro thermal analysis equipment and mini material stress-temperature combined test benches.
Semiconductor Production Line Thermal Monitoring Assemblies: Ultra-thin temperature measuring wire for chip aging test fixtures, wafer processing low-medium temperature detection modules.
Compact Precision Automation Micro Sensing Components: Long-life ultra-fine resistive wire for miniature industrial displacement sensors and micro thermal compensation circuit balancing coils.
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